linux中device->bus_id找不到
以下是轉載自
網友ying_seven的部落格(看到其也是轉載的,但是並沒有註明來處)
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按照國嵌的程式碼(LDD那本書上的程式碼也一樣):
struct device my_bus = {
.bus_id = "my_bus0",
.release = my_bus_release,
};
static int my_match(struct device *dev, struct device_driver *driver)
{
return !strncmp(dev->bus_id, driver->name, strlen(driver->name));
}
編譯時,提示 struct device 中沒有bus_id 這樣的錯誤。開啟/lib/modules/2.6.35-28-generic/build/include/linux/device.h
找到struct device 的定義,裡面沒有bus_id,但有:
const char *init_name; /* initial name of the device */ 這句。
可見,要把上面結構中的.bus_id = "my_bus0", 改為 .init_name = "my_bus0",
同時上網搜到,return !strncmp(dev->bus_id, driver->name, strlen(driver->name));這句也要改成:
return !strncmp(dev_name(dev), driver->name, strlen(driver->name));
這樣編譯即可成功!
另注:
如果要設定裝置的名字,也不再使用strncpy(my_dev.bus_id, "my_dev", BUS_ID_SIZE); 而改用:
dev_set_name(&dev, "name");